Capital Gains Tax Estimator Use this calculator to estimate your capital gains tax. You are viewing this website at a small screen resolution which doesn't support calculators. Click here to view this calculator. Have A Question About This Topic? Name Email Address Message Thank you! Oops! Related Content Insurance Needs Assessment: Married With Children When you’re married and have children, insurance needs will be different. Red Flags for Tax Auditors Here are six flags that may make your tax return prime for an IRS audit. Insurance Needs Assessment: When You're Young and Single Even if you’re young and single, you should still consider protecting yourself.